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Nucleus, in biology, a specialized structure occurring in most cells (except bacteria and blue-green algae) and separated from the rest of the cell by a double layer, the nuclear membrane. The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes.
The cell nucleus (from Latin nucleus or nuculeus 'kernel, seed'; pl.: nuclei) is a membrane-bound organelle found in eukaryotic cells.Eukaryotic cells usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others including osteoclasts have many.
Jul 30, 2017 · The nucleus is surrounded by the endoplasmic reticulum, which is covered in spots by ribosomes. When the animal cell divides, the nucleus breaks up, and the nuclear envelope falls apart. The nuclear envelope is then reassembled around each new nucleus after the chromosomes have been divided. Plant Cell Nucleus. Above is a generic plant cell.
nucleus: [noun] the small bright body in the head of a comet. the small brighter and denser portion of a galaxy (see galaxy 1b).
The nucleus has 2 primary functions: It is responsible for storing the cell’s hereditary material or the DNA. It is responsible for coordinating many of the important cellular activities such as protein synthesis, cell division, growth and a host of other important functions. Test your Knowledge on Nucleus - Structure and Function!
Feb 4, 2021 · The nucleus is a double membrane-bound organelle located centrally only in a eukaryotic cell, enclosing the DNA, the genetic material. It is the most important and defining feature of all higher organisms, including plant and animal cells, whose main function is to control and coordinate the functioning of the entire cell.
